A method of navigating a self-propelled robotic tool comprises transmitting a wireless signal (66) along a first signal path between the robotic tool (14) and a first wireless interface of a base station (16) remote from the robotic tool (14); transmitting a wireless signal (66) along a second signal path between the robotic tool (14) and a second wireless interface of the base station (16), said second wireless interface being spatially separated from the first wireless interface by a separation distance; upon receipt, comparing the signal transmitted along the first signal path with the signal transmitted along the second signal path to obtain a propagation time difference between the signal transmitted along the first signal path and the signal transmitted along the second signal path, said propagation time difference defining a path length difference between said first and second signal paths; and calculating, based on the separation distance and the path length difference, a value representative of a bearing (φ) from the base station (16) to the robotic tool (14).


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    Title :

    Self-propelled robotic tool navigation


    Contributors:

    Publication date :

    2020-12-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    A01D Ernten , HARVESTING / A47L DOMESTIC WASHING OR CLEANING , Waschen oder Reinigen im Haushalt / B25J Manipulatoren , MANIPULATORS / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES , Systeme zum Steuern oder Regeln nichtelektrischer veränderlicher Größen



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